Pick-resistant lock construction including jamming feature

ABSTRACT

A keyed, pin tumbler type lock has one or a series of jamming pin members in the casing intermediate the path of rotation of the lock cylinder between locked and unlocked positions. Attempted rotation of the lock cylinder from locked toward unlocked position without use of the key permits the jamming pin members to move inwardly partially into the lock cylinder jamming it against further rotation to the unlocked position. The jamming pin members are axially split pins outwardly axially abutted by spring urged wedge members which force the split pins partially into the lock cylinder pin openings while radially separating the split pins to engage them axially outward with casing shoulders, thereby permanently positioning the jamming pins in lock cylinder jamming position.

United States Patent 1191 Gerlach [54] PICK-RESISTANT LOCK CONSTRUCTIONINCLUDING JAMMING FEATURE [75] Inventor: John R. Gerlach, Monterey Park,

Calif.

[73] Assignee: ,Emhart Corporation, Bloomfield,

Conn.

[22] Filed: Feb. 28, 1973 [21] Appl. N0.: 336,838.

52 us. c1. 70/421, 70/378 [51] int. Cl.-. E05b 15/l4, E05b 63/00 [58]Field of Search 70/15, 364 -A, 378, 421,

[56] References Cited UNITED STATES PATENTS 1,707,922 4/1929 Pepper70/421 2,836,973 6/1958 Schillizzi- 70/421 3,195,330 7/1965 Bauer 70/4215/l965 liiauermi. 70/421 1111 3,802,234 1451 Apr. 9, 1974 Primaryliraminer Robert L'. Wolfe "Attorney, Agent, or Firm-Mahoney, Schick &Cislo [5 7] ABSTRACT A keyed, pin tumbler type lock has one or a seriesof jamming pin members inthe casing intermediate the path of rotation ofthe lock cylinder between locked and unlocked positions. Attemptedrotation of. the

: lock cylinder from locked toward unlocked position without used thekey permits the jamming pin members to move inwardly partially intothe-lock. cylinder jamming it against further-rotation to the unlockedpo- 1 sition. The jamming pin members are axially split pins outwardlyaxially abutted by spring urged wedge members which force the split pinspartiallyinto the lock cylinder pin openings while radially separatingthe split pins to engage them;' axially outward with casing I shoulders;thereby permanently positioning the jamming pins in lock cylinderjamming position.

11 Claims, 4 Drawing Figures PICK-RESISTANT LOCK CONSTRUCTION INCLUDINGJAMMING FEATURE BACKGROUND OF THE INVENTION This invention relates to apick-resistant lock construction including a jamming feature, and moreparticularly, to a lock construction having a unique and highly positiveform of pick-resistant jamming means incorporated therein which ispassive during the normal operation of the lock using proper unlockingprocedure, but which is automatically operable to jam the lock andpositively prevent movement into unlocked position upon an attemptedimproper unlocking procedure being used. Even more particularly, thepick resistant jamming means of the lock makes use of an axially splitjamming member or members in combination with wedge means always bearingaxially thereagainst so that upon jamming condition, the wedge meansseparates the jamming member parts to jam the lock against furthermovement into unlocked position.

Various prior forms of pick-resistant lock constructions incorporatingsundry jamming features have heretofore been provided, none of which,prior to the present invention, have been completely satisfactory. Thoseprior constructions which have not been prohibitivefrom the economicstandpoint have not been totally positive in automatic operation lendingto a situation of being relatively easily frustrated. Where totallypositive operation for positive jamming has been successfullyincorporated, the costs thereof for the provisions of the same have beenexcessive.

Considering for example the incorporation of a pickresistant jammingfeature in a common'pin tumbler type of lock wherein the usual normallocking pins retain a lock cylinder against rotation from a lockedposition and a key of proper configuration is used to position thenormal locking pins for rotation of the lock cylinder to an unlockedposition, it is relatively easy to incorporate one or more jamming pins.A jamming pin may be installed in the lock casing intermediate the pathof rotation of the lock cylinder between locked and unlocked positionand the jamming pin may be retained totally within the lock casingduring normal lock operation through the properly configured key and thepart of one of the normal locking pins remaining in the lock cylinderduring normal key operated movement thereof. When, however, throughpicking or other similar manipulation, the normal locking pins arereleased without use of the key and the lock cylinder is moved towardunlocked position necessarily passing the jamming pin location, thejamming pin may be resiliently urged inwardly partially into thecylinder pin hole so as to jam the lock cylinder against furtherrotative movement. 7

Assuming that the jamming pin is merely a conventional, cylindrical pinsegment just as may be found in the normal locking pins of the lock, itsmounting may be relatively simple and its operation or movement intojamming posture may be of a relatively positive nature. The primedifficulty is that such a jamming pin may be relatively easily picked ormanipulated in the same manner as were the normal locking pins. Thus,although the surreptitious lock manipulation may be slightly moredifficult, it can be accomplished in the same manner without greatdifficulty to those expert in that form of lock manipulation.

For this reason, various of the prior constructions have included morecomplex jamming pins. Again, as an example, many of these prior forms oflocks including the jamming features have added various keeperarrangements assembled in the lock casing adjacent the jamming pin forengaging the jamming pin once the same has moved inwardly into itsjamming position for positively retaining the jamming pin in suchjamming position. Although these complex arrangement have added to theproblems of positive operation of the jamming pin or pins, a majordifficulty therewith has been that they are relatively complicated andrequire additional expert workmanship markedly increasing the cost ofprovision of lock constructions incorporating the same.

Despite the relatively extensive development of pick resistant jammingfeatures for locks, therefore, there still is a long-felt want and needfor satisfying the basic desires for a pick resistant lock. Asherein-before stated, the pick-resistant jamming feature must be ofabsolute positive operation, not capable of being easily picked ormanipulated. At the same time, the pickresistant jamming feature must beof a relatively simple nature and capable of being incorporated inconventional lock constructions for a minimum of added cost.

OBJECTS AND SUMMARY OF THE INVENTION It is, therefore, an object of thisinvention to provide a pick-resistant lock construction including ajamming feature wherein the lock has a unique and highly positive formof pick-resistant jamming means therein passive during normal operationof the lock using proper unlocking procedures, but automaticallyoperable to jam the lock and positively prevent movement into unlockedposition upon attempted improper unlocking procedures being used.According to the broader principles of the present invention, a radiallyseparable jamming member is used capable of movement from a radiallyclosed non-jamming position to a radially sepa rated jamming position,such radial separation in the jamming position being accomplished bywedge means constantly bearing axially against the jamming member andconstantly wedge urging the jamming member into its-radially separatedjamming position. Thus, the jamming member remains passive in itsradially closed nonjamming position during normal operation of the lock,but on improper operation of the lock, the jamming member isautomatically radially separated by the wedge means to jam the lockagainst further movement preventing unlocking.

It is a further object of this invention to provide a pick-resistantlock construction including a jamming feature which, in the preferredform or forms thereof, not only is positively operable upon attemptedpicking or similar improper operation of the lock to jam the lockagainst unlocking, but once'moved into its jamming position, will besecured in such jamming position and cannot be moved therefrom withoutvirtual lock destruction. A preferred embodiment of the lockconstruction of the present invention includes an axially split andaxially movable jamming pin with a wedge member resiliently urgedaxially thereagainst tending to move the jamming pin axially andradially separate the same. The combined jamming pin and resilientlyurged wedge member are retained in the lock casing passive during normaloperation of the lock, but upon 3 lock improper operation such as bypicking, the jamming pin is automatically urged axially inwardly by thewedge member and into partial reception within the lock operating memberor cylinder jamming the lock operation member or cylinder againstfurther movement toward its unlocked-position. At the same time, thewedge member also radially separates the jamming pin and forces thejamming member separated parts behind shoulders of the lock casingpositively preventing the jamming member from again moving outwardly tonon-jamming position and permanently jamming the lock.

It is also an object of this invention to provide a pick resistant lockconstruction including a jamming feature which satisfies either or bothof the foregoing objects, yet which may be provided with littlealteration to present lock constructions not having a pick-resistantfeature therein and which may be provided at a minimum of added expensefully justified by the added security features involved. For instance;considering for example a common pin tumbler type of lock, it is onlynecessary to addpin openings in the lock casing of a number commensuratewith the number of jamming members to be provided, such pin openingsbeing located intermediate the path of travel of the operating member orcylinder between locked and unlocked position. The assembly of theradially separable jamming members and their resiliently urged wedgemeans is a simple as sembly operation quite similar to the assembling ofthe conventional locking pins since everthing is assembled in thepreviously formed added pin openings.

BRIEF DESCRIPTION OF THE DRAWING FIG. I is a fragmentary, verticalsectional view of a typical pin tumbler type of lock incorporatinganembodiment of the pick-resistant jamming feature of the presentinvention, the lock cylinder being shown in locked position with aproperly configured key positioning the normal locking pins ready forunlocking rotation of the lock cylinder;

FIG. 2 is a vertical sectional view looking in the di-.

rection of the arrows 2-2 in FIG. 1 and showing the assembly forming thejamming feature retained passive in non-jamming position;

FIG. 3 is a view similar to FIG. 2 but with the lock cylinder rotated bythe key intermediate the lock cylinder rotation between locked andunlocked position, the key and a normal locking pin segment retainingthe assembly forming the jamming feature passive in nonjamming position;and

FIG. 4 is a view similar to FIG. 3, but with the key removed and theassembly forming the jamming feature moved to jamming position.

DESCRIPTION OF THE BEST EMBODIMENT CONTEMPLATED Referring to thedrawings, a preferred embodiment of the pick-resistant jamming featureof the present invention is illustrated in a typical pin tumbler type oflock including a casing circumferentially rotatably mounting anoperating member in the form of a lock cylinder 12. It is pointed out,however, as will be hereinafter more apparent to those skilled in theart, that the pick-resistant jamming feature principles of the presentinvention are likewise applicable to many forms of conventional lockswhether the pin tumbler type or otherwise and regardless of thedirection of movement of the operating member or members. Thus, inconsideration of the principles of the present invention, the sameshould be broadly construed within the limitations of the appendedclaims hereof.

The lock cylinder 12 for this form of lock is a keyed radially alignedwith casing pin openings when the lock cylinder is in its lockedposition as shown in FIGS. 1 and 2. Positioned primarily within thecylinder pin openings 18 is'a series of radially movable cylinder pinsegments 22 which, when the lock cylinder 12 is positioned in the FIG. 1and 2 locked position, are radially inwardly axially abutted by a seriesof easing pin segments 24 resiliently urged axially inwardly, radiallyof the lock cylinder l2 and the casing 10 by a series of coil pinsprings 26.

As is usual, the cylinder pin segments 22 are formed of various axiallengths commensurate with the configuration of the key 16 so that whenthe key having the proper configuration is inserted in the key slot 14,the key will position the cylinder pin segments 22 with their outer endsexactly at the periphery of the lock cylinder 12 and the casing pinsegments 24 with their inner ends exactly at this lock cylinderperiphery. Thus, this will position the cylinder and casing pin segments22 and 24 in a movement non-frustrating position of the lock cylinder l2and permit rotative movement of the lock cylinder from the lockedposition shown in FIGS. 1 and 2 to an unlocked position (not shown)rotated in the order of to counter-clockwise looking in the direction ofFIG. 2. When, however, an improperly configured key is inserted in thekey slot 14 or no key is inserted therein, the separation between thecylinder and easing pin segments'22 and 24 with at least'some of theseabutting pin segments will be radially displaced from the periphery ofthe lock cylinder 12 when the lock cylinder is in the locked positionshown in FIGS. 1 and 2 so that these pin segments will effectively blockrotation of the lock cylinder to frustrate movement thereof and preventmovement from the locked toward the unlocked position. As thus fardescribed, of course, the lock construction comprises a usual pintumbler type of lock operable in the usual manner, all well known tothose skilled in the art.

More particularly to the pick-resistant jamming feature of the presentinvention, at least one jamming means generally-indicated at 28 isformed in the casing 10 intermediate the path. of rotation of the lockcylinder 12 between its locked and unlocked positions. For maximumsecurity, one of the jamming means 28 will be located circumferentiallyaligned with each of the casing pin openings 20 at this intermediaterotative position of the lock cylinder 12 between its locked andunlocked positions. For the present purposes of description, however,each of the jamming means 28 may be substantially the same so that onlyone is shown and described herein circumferentially aligned with themidway of the casing pin openings 20.

As shown, the jamming means 28 includes a jamming pin opening 30radially aligned with the lock cylinder 12 and opening axially towardthe lock cylinder. The

. jamming pin opening 30 is formed with a cylindrical outer reducedportion 32 opening axially inwardly into a cylindrical inner andenlarged portion 34 forming an annular shoulder 36 therebetween.Assembled within the jamming pin opening 30 starting at an outer closedend thereof is resilient means in the form of a coil spring 38 bearingaxially inwardly against wedge means in the form of a wedge member 40which, in turn, bears axially inwardly against an axially split,radially separable jamming pin 42.

The coil spring 38 is retained in a compressed condition in allpositions of the wedge member 40 and the jamming pin 42. The wedgemember 40 is preferably generally cylindrical with a generally conicalinward leading end 44 inwardly abutting and received in a similarconical recess 46 formed preferably one-half in each of the splitsegments of the jamming pin 42.

As shown in FIGS. 2 and 3, the respective lengths of the outer reducedportion 32 and inner enlarged portion 34 of the jamming pin opening 30and that of the jamming pin 42 are such that when the jamming pin isfully retained within the jamming pin opening, the jamming pin ismaintained closed in a non-jamming position merely being borne againstby the wedge member 40 as urged by the coil spring 38. When, however,the inner end of the wedge member 40 is received partially axiallyinwardly into the respective cylinder pin opening 18, the outer end ofthe jamming pin passes axially inwardly of the shoulder 36 in thejamming pin opening 30 and the jamming pin split segments are urgedradially outwardly to axially outwardly engage the shoulder by the wedgemember 40 being forced axially relative to the jamming pin by the coilspring 38.

In operation of the pin tumbler type of lock incorporating thepick-resistant jamming feature of the present invention, therefore, withthe lock cylinder 12 in its locked position and without insertion of thekey 16, the normal locking pins comprised of the cylinder and casing pinsegments 22 and 24 will be urged axially inwardly by the coil pinsprings 26 to block rotative movement of the lock cylinder 12 from thelocked position in the usual manner. Furthermore, when a properlyconfigured key 16 is inserted in the key slot 14 of the lock cylinder12, the cylinder and easing pin segments 22 and 24 will be positioned asshown in FIGS. 1 and 2 so that the parting line between the cylinder andeasing sets of these pin segments will be exactly at the periphery ofthe lock cylinder permitting rotative movement of the lock cylinder fromthe locked position toward unlocked position. As shown in FIG. 2, duringpositioning of the lock cylinder 12 in the locked position andregardless of the condition of the cylinder and easing pin segments 22and 24, the jamming pin 42 will be retained fully within the casing bythe periphery of the lock cylinder 12, and during the proper rotation ofthe lock cylinder between its locked position and unlocked positionusing the properly configured key 16, as the appropriate cylinder pinsegment 22 arrives circumferentially at the jamming pin opening 30, thejamming pin 42 will still be retained fully within the casing 10 by thiscylinder pin segment 22 as shown in FIG. 3. Thus, in proper operationand using the properly configured key 16, the jamming means 28, whetherone assembly or a series of assemblies, cannot affect the properoperation of the lock and the proper movement of the lock cylinder 12from locked to unlocked and back to locked position.

Assume, however,'that the lock cylinder 12 is in the locked position, noproperly configured key 16 is used and the lock is picked in the usualmanner. In such picking, the casing pin segments 24 would be raised toat least the periphery of the lock cylinder 12 so that these pinsegments would no longer frustrate movement of the lock cylinder and itwould be begun rotation from the locked position toward the unlockedposition. In such case, as the cylinder pin openings 18 arrive at thejamming pin opening 30, the appropriate cylinder pin segment 22 will beat a lowered position as shown in FIG. 4 in view of the key 16 beinglacking to retain the same upwardly and this will permit the springurged wedge member 40 to urge the jamming pin 42 axially inwardly toengage partially within the appropriate cylinder pin opening. At thesame time, as the jamming pin 42 moves inwardly into its jammingposition fully inwardly of the shoulder 36 of the jamming pin opening30, the wedge member 40 will move axially relative to and more fullywithin the jamming pin 42 spreading the split segments of the jammingpin permanently engaging the jamming pin segments in axial outwardinterference with the shoulder 36 in view of the constant pressure ofthe coil spring 38 against the wedge member 40.

Thus, in the attempted picking, the lock cylinder 12 is permanentlyjammed against further rotation and against rotation to the unlockedposition. Furthermore, even though further picking is attempted, it isimpossible to move the jamming pin 42 outwardly to once again permitrotation of the lock cylinder 12 since the jamming pin split segmentsare permanently radially separated and retained against the shoulder 36by the constant pressure of the wedge member 40. This wedge separationof the jamming pin 42 by the wedge member 40 upon the movement of thejamming pin from its outer non-jamming position to its inner jammingposition thereby completely frustrates operation of the lock despite thepicking thereof.

According to the principles of the present invention, therefore, apick-resistant lock construction including the unique jamming feature isprovided which is not only of highly positive jamming form upon pickingthereof being attempted and once the jamming position is assumed, thesame is permanently retained, but the jamming feature can be installedin presently existing locks with only slight alteration adding a minimumof expense. As can be clearly seen, one or more of the jamming pinopenings 30 can be added to a conventional casing 10 by nearly the sameprocedures as are used for forming the normal casing pin openings 20,the

only difference of the jamming pin openings 30 being that they areshouldered openings. To complete the jamming means 28, it is then merelynecessary to install the assembly of the coil spring 38, wedge member 40and jamming pin 42, again in a similar manner to the normal installationof the coil pin springs 26 and easing pin segments 24.

I claim:

1. In a pick-resistant lock construction; the combination: a casing; anoperating member normally movable in said casing between locked andunlocked positions; movement frustrating means operably associated withsaid operating member normally frustrating movement of said operatingmember from said locked position; unlocking means properly operable withsaid operating member for interrupting operation of said movementfrustrating means and permitting movement of said operating member fromsaid locked position to said unlocked position; jamming means operablyassociated with said operating member automatically actionable upon saidoperating member being moved from said locked toward said unlockedposition without use of said unlocking means for jamming said operatingmember against further movement including a radially separable jammingmember movable from a radially closed non-jamming to a radiallyseparated jamming position, wedge means constantly bearing axiallyagainst said jamming member and constantly wedge urging said jammingmember toward said radially separated jamming position, said unlockingmeans during proper operation with said operating member retaining saidjamming member in said radially closed non-jamming position duringmovement of said operating member from said locked to said unlockedposition, said wedge means moving axially relative to said jammingmember and wedge radially separating said jamming member into saidjamming position upon said operating member being moved from said lockedtoward said unlocked position without use of said unlocking means.

2. A pick-resistant lock construction as defined in claim 1 in whichsaid wedge means moves said jamming member axially from said non-jammingto said jamming position and wedge radially separates said jammingmember at least in said jamming position.

3. A pick-resistant lock construction as defined in claim 1 in whichsaid jamming member includes an axially split and axially movable pinfully within said casing in said radially closed non-jamming positionand being movable axially partially into said operating member in saidjamming position; in which shoulder means is formed in said casingaxially intermediate said jamming member in said jamming membernonjamming position and axially outward of said jamming member in saidjamming member jamming position; and in which said wedge means movessaid jamming member axially inward from said jamming member non-jammingposition to said jamming member jamming position, said wedge means wedgeradially separating said jamming member in said jamming positionengaging said jamming member with said casing shoulder means to resistsubsequent axial outward movement of said jamming member from saidjamming position.

4. A pick-resistant lock construction as defined in claim 1 in whichsaid jamming member includes an axially split and axially movable pinfully within said casing in said radially closed non-jamming positionand being movable axially inwardly partially into said operating memberin said jamming position, said jamming member having a recess formed inan outer end thereof partially in each of radially separable portionsthereof;

in which shoulder means is formed in the said casing axiallyintermediate said jamming member in said jamming member non-jammingposition and axially outward of said jamming member in said jammingmember jamming position; and in which said wedge means includes a wedgemember in said casing having an axially inwardly projecting wedge-shapedend portion constantly received in said jamming member end recess,resilient means in said casing constantly urging said wedge memberaxially inwardly toward said jamming member, said wedge member movingsaid jamming member axially inward from said jamming member non-jammingposition tosaid jamming member jamming position, said wedge member wedgeradially separating said jamming member in said jamming positionengaging said jamming member with said casing shoulder means to resistsubsequent axial outward movement of said jamming member from saidjamming position.

5. A pick-resistant lock construction as defined in claim 1 in whichsaid operating member includes a lock cylinder; in which said movementfrustrating means includes a series of pin tumbler means each havingportions in said casing and portions in said lock cylinder, said pintumbler means normally blocking movement of said lock cylinder in saidlocked position; in which said unlocking means includes a key properlyoperable in said lock cylinder moving said pin tumbler means to aposition free of blocking said lock cylinder movement and permittingmovement of said lock cylinder from said locked position to saidunlocked position; and in which said jamming means is operablyassociated with said casing and said lock cylinder automaticallyactionable upon said lock cylinder being moved from said locked towardsaid unlocked position without use of said key for jamming said lockcylinder against further movement.

6. A pick-resistant lock construction as defined in claim 1 in whichsaid operating member includes a lock cylinder; in which said movementfrustrating means includes a series of pin tumbler means each havingportions in said casing and portions in said lock cylinder, said pintumbler means normally blocking movement of said lock cylinder in saidlocked position; in which said unlocking means includes a keyproperlyoperable in said lock cylinder moving said pin tumbler means toa position free of blocking said lock cylinder movement and permittingmovement of said lock cylinder from said locked position to saidunlocked position; and in which said jamming means is operablyassociated with said casing and said lock cylinder automaticallyactionable upon said lock cylinder being moved from said locked towardsaid unlocked position without use of said key for jamming said lockcylinder against further movement, said wedge means moving said jammingmember axially from said non-jamming to said jamming position and wedgeradially separating said jamming member at least in said jammingposition.

7. A pick-resistant lock construction as defined in claim 1 in whichsaid operating member includes a lock cylinder; in which said movementfrustrating means includes a series of pin tumbler means each havingportions in said casing and portions in said lock cylinder, said pintumbler means normally blocking movement of said lock cylinder in saidlocked position; in which said unlocking means includes a key properlyoperable in said lock cylinder moving said pin tumbler means to aposition free of blocking said lock cylinder movement and permittingmovement of said lock cylinder from said locked position to saidunlocked position; in which said jamming means is operably associatedwith said casing and said lock cylinder automatically actionable uponsaid lock cylinder being moved from said locked toward said unlockedposition without use of said key for jamming said lock cylinder againstfurther move ment, said jamming member including an axially split andaxially movable pin fully within said casing in said radially closednon-jamming position and being movable axially partially into said lockcylinder in said jamming position; in which shoulder means is formed insaid casing axially intermediate said jamming member in said jammingmember non-jamming position and axially outward of said jamming memberin said jamming member jamming position; and in which said wedge meansmoves said jamming member axially inward from said jamming membernon-jamming position to said jamming member jamming position, said wedgemeans wedge radially separating said jamming member in said jammingposition engaging said jamming member with said casing shoulder means toresist subsequent axial outward movement of said jamming member fromsaid jamming position.

8. A pick-resistant lock construction as defined in claim 1 in whichsaid operating member includes a lock cylinder; in which said movementfrustrating means includes a series of pin tumbler means each havingportions in said casing and portions in said lock cylinder, said pintumbler means normally blocking movement of said lock cylinder in saidlocked position; in which said unlocking means includes a key properlyoperable in said lock cylinder moving said pin tumbler means to aposition free of blocking said lock cylinder movement and permittingmovement of said lock cylinder from said locked position to saidunlocked position; in which said jamming means is operably associatedwith said casing and said lock cylinder automatically actionable uponsaid lock cylinder being moved from said locked toward said unlockedposition without use of said key for jamming said lock cylinder againstfurther movements; in which said jamming member includes an axiallysplit and axially movable pin fully within said casing in said radiallyclosed non-jamming position and being movable axially inwardly partiallyinto said lock cylinder in said jamming position, said jamming memberhaving a recess formed in an outer end thereof partially in each ofradially separable portions thereof; in which shoulder means is formedin said casing axially intermediate said jamming member in said jammingmember non-jamming position and axially outward of said jamming memberin said jamming member jamming position; and in which said wedge meansincludes a wedge member in said casing having an axially inwardlyprojecting wedge-shaped end portion constantly received in said jammingmember recess, resilient means in said casing constantly urging saidwedge member axially inwardly toward said jamming member, said wedgemember moving said jamming member axially inward from said jammingmember non-jamming position to said jamming member jamming position,said wedge member wedge radially separating said jamming member in saidjamming position engaging said jamming member with said casing shouldermeans to resist subsequent axial outward movement of said jamming memberfrom said jamming position.

9. A pick-resistant lock construction as defined in claim 1 in whichsaid operating member includes a lock cylinder rotatable in said casing;in which said movement frustrating means includes a series of pintumbler means each having portions in said casing and portions in saidlock cylinder, said pin tumbler means normally blocking rotation of saidlock cylinder in said locked position; in which said unlocking meansincludes a key properly operable in said lock cylinder moving said pintumbler means to a position free of blocking said lock cylinder rotationand permitting rotation of said lock cylinder from said locked positionto said unlocked position; and in which said jamming means is operablyassociated with said casing and said lock cylinder automaticallyactionable upon said lock cylinder being rotated from said locked towardsaid unlocked position without use of said key for jamming said lockcylinder against further rotative movement, said wedge means moving saidjamming member axially from said nonjamming to said jamming position andwedge radially separating said jamming member at least in said jammingposition.

10. A pick-resistant lock construction as defined in claim 1 in whichsaid operating member includes a lock cylinder rotatable in said casing;in which said movement frustrating means includes a series of pintumbler means each having portions in said casing and portions in saidlock cylinder,,said pin tumbler means normally blocking rotativemovement of said lock cylinder in said locked position; in which saidunlocking means includes a key properly operable in said lock cylindermoving said pin tumbler means to a position free of blocking said lockcylinder rotative movement and permitting rotative movement of said lockcylinder from said locked position to said unlocked position; in whichsaid jamming means is operably associated with said casing and said lockcylinder automatically actionable circumferentially intermediate saidlock cylinder locked and unlocked position upon said lock cylinder beingrotated from said locked toward said unlocked position without use ofsaid key for jamming said lock cylinder against further rotativemovement, said jarnming member including an axially split and axiallymovable pin fully within said casing in said radially closed non-jammingposition and being moved axially partially into said lock cylinder insaid jamming position; in which shoulder means is formed in said casingaxially intermediate said jamming member in said jamming membernon-jamming position and axially outward of said jamming member in saidjamming member jamming position; and in which said wedge means movessaid jamming member axially inward from said jamming member non-jammingposition to said jamming member jamming position, said wedge means wedgeradially separating said jamming member in said jamming positionengaging said jamming member with said casing shoulder means to resistsubsequent axial outward movement of said jamming member from saidjamming position.

11. A pick-resistant lock construction as defined in Claim 1 in whichsaid operating member includes a lock cylinder rotatable in said casing;in which said movement frustrating means includes a series of pintumbler means each having portions in said casing and portions in saidlock cylinder, said pin tumbler means normally blocking rotativemovement of said lock cylinder in said locked position; in which saidunlocking means includes a key properly operable in said lock cylindermoving said pin tumbler means to a position free of blocking said lockcylinder rotative movement and permitting rotation of said lock cylinderfrom said locked position to said unlocked position; in which saidjamming means is operably associated with said casing and said lockcylinder automatically actionable intermediate said lock cylinder lockedand unlocked positions upon said lock cylinder being rotated from saidlocked toward said unlocked position without use of said key for jammingsaid lock cylinder against further rotative movement; in which saidjamming member ineludes an axially split and axially movable pin fullywithin said casing in said radially closed non-jamming position andbeing movable axially inwardly partially into said lock cylinder in saidjamming position, said jamming member having a recess formed in an outerend thereof partially in each of radially separable portions thereof; inwhich shoulder means is formed in said casing axially intermediate saidjamming member in said jamming member non-jamming position and axiallyoutward of said jamming member in said jamming member jamming position;and in which said wedge means includes a wedge member in said casinghaving an axially inwardly projecting wedge-shaped end portionconstantly received in said jamming member end recess, resilient meansin said casing constantly urging said wedge member axially inwardlytoward said jamming member, said wedge member moving said jamming memberaxially inward from said jamming member non-jamming position to saidjamming member jamming position, said wedge member moving axiallyrelative to said jamming member wedge radially separating said jammingmember in said jamming position engaging said jamming member with saidcasing shoul der means to resist subsequent axial outward movement ofsaid jamming member from said jamming position.

1. In a pick-resistant lock construction; the combination: a casing; anoperating member normally movable in said casing between locked andunlocked positions; movement frustrating means operably associated withsaid operating member normally frustrating movement of said operatingmember from said locked position; unlocking means properly operable withsaid operating member for interrupting operation of said movementfrustrating means and permitting movement of said operating member fromsaid locked position to said unlocked position; jamming means operablyassociated with said operating member automatically actionable upon saidoperating member being moved from said locked toward said unlockedposition without use of said unlocking means for jamming said operatingmember against further movement including a radially separable jammingmember movable from a radially closed non-jamming to a radiallyseparated jamming position, wedge means constantly bearing axiallyagainst said jamming member and constantly wedge urging said jammingmember toward said radially separated jamming position, said unlockingmeans during proper operation with said operating member retaining saidjamming member in said radially closed non-jamming position duringmovement of said operating member from said locked to said unlockedposition, said wedge means moving axially relative to said jammingmember and wedge radially separating said jamming member into saidjamming position upon said operating member being moved from said lockedtoward said unlocked position without use of said unlocking means.
 2. Apick-resistant lock construction as defined in claim 1 in which saidwedge means moves said jamming member axially from said non-jamming tosaid jamming position and wedge radially separates said jamming memberat least in said jamming position.
 3. A pick-resistant lock constructionas defined in claim 1 in which said jamming member includes an axiallysplit and axially movable pin fully within said casing in said radiallyclosed non-jamming position and being movable axially partially intosaid operating member in said jamming position; in which shoulder meansis formed in said casing axially intermediate said jamming member insaid jamming member non-jamming position and axially outward of saidjamming member in said jamming member jamming position; and in whichsaid wedge means moves said jamming member axially inward from saidjamming member non-jamming position to said jamming member jammingposition, said wedge means wedge radially separating said jamming memberin said jamming position engaging said jamming member with said casingshoulder means to resist subsequent axial outward movement of saidjamming member from said jamming position.
 4. A pick-resistant lockconstruction as defined in claim 1 in which said jamming member includesan axially split and axially movable pin fully within said casing insaid radially closed non-jamming position and being movable axiallyinwardly partially into said operating member in said jamming position,said jamming member having a recess formed in an outer end thereofpartially in each of radially separable portions thereof; in whichshoulder means is formed in the said casing axially intermediate saidjamming member in said jamming member non-jamming position and axiallyoutward of said jamming member in said jamming member jamming position;and in which said wedge means includes a wedge member in said casinghaving an axially inwardly projecting wedge-shaped end portionconstantly received in said jamming member end recess, resilient meansin said casing constantly urging said wedge member axially inwardlytoward said jamming member, said wedge member moving said jamming memberaxially inward from said jamming member non-jamming position to saidjamming member jamming position, said wedge member wedge radiallyseparating said jamming member in said jamming position engaging saidjamming member with said casing shoulder means to resist subsequentaxial outward movement of said jamming member from said jammingposition.
 5. A pick-resistant lock construction as defined in claim 1 inwhich said operating member includes a lock cylinder; in which saidmovement frustrating means includes a series of pin tumbler means eachhaving portions in said casing and portions in said lock cylinder, saidpin tumbler means normally blocking movement of said lock cylinder insaid locked position; in which said unlocking means includes a keyproperly operable in said lock cylinder moving said pin tumbler means toa position free of blocking said lock cylinder movement and permittingmovement of said lock cylinder from said locked position to saidunlocked position; and in which said jamming means is operablyassociated with said casing and said lock cylinder automaticallyactionable upon said lock cylinder being moved from said locked towardsaid unlocked position without use of said key for jamming said lockcylinder against further movement.
 6. A pick-resistant lock constructionas defined in claim 1 in which said operating member includes a lockcylinder; in which said movement frustrating means includes a series ofpin tumbler means each having portions in said casing and portions insaid lock cylinder, said pin tumbler means normally blocking movement ofsaid lock cylinder in said locked position; in which said unlockingmeans includes a key properly operable in said lock cylinder moving saidpin tumbler means to a position free of blocking said lock cylindermovement and permitting movement of said lock cylinder from said lockedposition to said unlocked position; and in which said jamming means isoperably associated with said casing and said lock cylinderautomatically actionable upon said lock cylinder being moved from saidlocked toward said unlocked position without use of said key for jammingsaid lock cylinder against further movement, said wedge means movingsaid jamming member axially from said non-jamming to said jammingposition and wedge radially separating said jamming member at least insaid jamming position.
 7. A pick-resistant lock construction as definedin claim 1 in which said operating member includes a lock cylinder; inwhich said movement frustrating means includes a series of pin tumblermeans each having portions in said casing and portions in said lockcylinder, said pin tumbler means normally blocking movement of said lockcylinder in said locked position; in which said unlocking means includesa key properly operable in said lock cylinder moving said pin tumblermeans to a position free of blocking said lock cylinder movement andpermitting movement of said lock cylinder from said locked position tosaid unlocked position; in which said jamming means is operablyassocIated with said casing and said lock cylinder automaticallyactionable upon said lock cylinder being moved from said locked towardsaid unlocked position without use of said key for jamming said lockcylinder against further movement, said jamming member including anaxially split and axially movable pin fully within said casing in saidradially closed non-jamming position and being movable axially partiallyinto said lock cylinder in said jamming position; in which shouldermeans is formed in said casing axially intermediate said jamming memberin said jamming member non-jamming position and axially outward of saidjamming member in said jamming member jamming position; and in whichsaid wedge means moves said jamming member axially inward from saidjamming member non-jamming position to said jamming member jammingposition, said wedge means wedge radially separating said jamming memberin said jamming position engaging said jamming member with said casingshoulder means to resist subsequent axial outward movement of saidjamming member from said jamming position.
 8. A pick-resistant lockconstruction as defined in claim 1 in which said operating memberincludes a lock cylinder; in which said movement frustrating meansincludes a series of pin tumbler means each having portions in saidcasing and portions in said lock cylinder, said pin tumbler meansnormally blocking movement of said lock cylinder in said lockedposition; in which said unlocking means includes a key properly operablein said lock cylinder moving said pin tumbler means to a position freeof blocking said lock cylinder movement and permitting movement of saidlock cylinder from said locked position to said unlocked position; inwhich said jamming means is operably associated with said casing andsaid lock cylinder automatically actionable upon said lock cylinderbeing moved from said locked toward said unlocked position without useof said key for jamming said lock cylinder against further movements; inwhich said jamming member includes an axially split and axially movablepin fully within said casing in said radially closed non-jammingposition and being movable axially inwardly partially into said lockcylinder in said jamming position, said jamming member having a recessformed in an outer end thereof partially in each of radially separableportions thereof; in which shoulder means is formed in said casingaxially intermediate said jamming member in said jamming membernon-jamming position and axially outward of said jamming member in saidjamming member jamming position; and in which said wedge means includesa wedge member in said casing having an axially inwardly projectingwedge-shaped end portion constantly received in said jamming memberrecess, resilient means in said casing constantly urging said wedgemember axially inwardly toward said jamming member, said wedge membermoving said jamming member axially inward from said jamming membernon-jamming position to said jamming member jamming position, said wedgemember wedge radially separating said jamming member in said jammingposition engaging said jamming member with said casing shoulder means toresist subsequent axial outward movement of said jamming member fromsaid jamming position.
 9. A pick-resistant lock construction as definedin claim 1 in which said operating member includes a lock cylinderrotatable in said casing; in which said movement frustrating meansincludes a series of pin tumbler means each having portions in saidcasing and portions in said lock cylinder, said pin tumbler meansnormally blocking rotation of said lock cylinder in said lockedposition; in which said unlocking means includes a key properly operablein said lock cylinder moving said pin tumbler means to a position freeof blocking said lock cylinder rotation and permitting rotation of saidlock cylinder from said locked position to said unlocked position; andin which said jamming means is operably associated with said casing andsaid lock cylinder automatiCally actionable upon said lock cylinderbeing rotated from said locked toward said unlocked position without useof said key for jamming said lock cylinder against further rotativemovement, said wedge means moving said jamming member axially from saidnon-jamming to said jamming position and wedge radially separating saidjamming member at least in said jamming position.
 10. A pick-resistantlock construction as defined in claim 1 in which said operating memberincludes a lock cylinder rotatable in said casing; in which saidmovement frustrating means includes a series of pin tumbler means eachhaving portions in said casing and portions in said lock cylinder, saidpin tumbler means normally blocking rotative movement of said lockcylinder in said locked position; in which said unlocking means includesa key properly operable in said lock cylinder moving said pin tumblermeans to a position free of blocking said lock cylinder rotativemovement and permitting rotative movement of said lock cylinder fromsaid locked position to said unlocked position; in which said jammingmeans is operably associated with said casing and said lock cylinderautomatically actionable circumferentially intermediate said lockcylinder locked and unlocked position upon said lock cylinder beingrotated from said locked toward said unlocked position without use ofsaid key for jamming said lock cylinder against further rotativemovement, said jamming member including an axially split and axiallymovable pin fully within said casing in said radially closed non-jammingposition and being moved axially partially into said lock cylinder insaid jamming position; in which shoulder means is formed in said casingaxially intermediate said jamming member in said jamming membernon-jamming position and axially outward of said jamming member in saidjamming member jamming position; and in which said wedge means movessaid jamming member axially inward from said jamming member non-jammingposition to said jamming member jamming position, said wedge means wedgeradially separating said jamming member in said jamming positionengaging said jamming member with said casing shoulder means to resistsubsequent axial outward movement of said jamming member from saidjamming position.
 11. A pick-resistant lock construction as defined inClaim 1 in which said operating member includes a lock cylinderrotatable in said casing; in which said movement frustrating meansincludes a series of pin tumbler means each having portions in saidcasing and portions in said lock cylinder, said pin tumbler meansnormally blocking rotative movement of said lock cylinder in said lockedposition; in which said unlocking means includes a key properly operablein said lock cylinder moving said pin tumbler means to a position freeof blocking said lock cylinder rotative movement and permitting rotationof said lock cylinder from said locked position to said unlockedposition; in which said jamming means is operably associated with saidcasing and said lock cylinder automatically actionable intermediate saidlock cylinder locked and unlocked positions upon said lock cylinderbeing rotated from said locked toward said unlocked position without useof said key for jamming said lock cylinder against further rotativemovement; in which said jamming member includes an axially split andaxially movable pin fully within said casing in said radially closednon-jamming position and being movable axially inwardly partially intosaid lock cylinder in said jamming position, said jamming member havinga recess formed in an outer end thereof partially in each of radiallyseparable portions thereof; in which shoulder means is formed in saidcasing axially intermediate said jamming member in said jamming membernon-jamming position and axially outward of said jamming member in saidjamming member jamming position; and in which said wedge means includesa wedge member in said casing having an axially inwardly projectingwedge-shaped end portion conStantly received in said jamming member endrecess, resilient means in said casing constantly urging said wedgemember axially inwardly toward said jamming member, said wedge membermoving said jamming member axially inward from said jamming membernon-jamming position to said jamming member jamming position, said wedgemember moving axially relative to said jamming member wedge radiallyseparating said jamming member in said jamming position engaging saidjamming member with said casing shoulder means to resist subsequentaxial outward movement of said jamming member from said jammingposition.